Machine for making cores.



F. HERBERT.

MACHINE FOR MAKING CORES.

APPLICATION I'ILBD 1150.7, 1908.

997,293, Patented July 11,1911.

5 BHBETS SHBET 1.

WITNESSES INVENT'OR' 9% Y Arron/ver- F. HERBERT.

MACHINE FOR MAKING CORES.

APPLIGATION FILED DEC. 1, 190a.

Patented July 11,1911;

6 SHEETSSHEET 2.

$14 M e/w INVENTU i' OR/V5) m1 /J 1 //j \i WITNESSES P. HERBERT.

MACHINE FOR MAKING GORES.

. APPLICATION FILED DEG. 7, 190B. 997,293

6 SHEETS-S HE-E'l 3.

J1EE] 1 INVENTOR fro/WE) Patented July 11, 1911.

F. HERBERT.

MACHINE FOR MAKING CORES' APPLICATION FILED DEG.7,1E!0?L 997,293. Patented July 11,1911.

5 SHEETSSHBET 4. QUE-4L F. HERBERT.

MACHINE FOR MAKING CORES.

APPLIUATION FILED D20. 7, mos.

Patented July 11,1911. 5 sauna-sum 5.

raven/[01" 114W IZ'ItIliJ] HERBERT, OF BIR'ILEY, ENGLAND.

MACHINE FOR MAKING CORES.

Specification of Letters Patent.

Application filed December 7, 1808.

Patented July 11, 1911.

Serial No. 466,202.

or other castin s.

A further 0 ject of the invention is'to provide a machine for making cores rapidly and economically.

Other ob'ects of the invention will appear more ully hereinafter.

The invention consists substantially in the construction,- combination, location, and relativearrangement of parts, all as will be more fully hereinafter set forth, as shown in the accompanying drawings,l

and finally pointed out in the appe'nde aims.

Referring to the accompanying drawings,

and to the. various views and reference signs appearing thereon,--F1gure 1 IS a view m core box opened and the finished core eing vertical central section of a ore making machine embodying the principles of my invention, the lower part of the machine being broken oil, the core box being partially closed, the measuring tool inserted therein, the plunger in its lower position, and the core bar In position to be advanced through the core 'box Fig. 2 is a similar view showing the core bar in its raised posit-ion at the completion of the core forming operation, the core box being completely closed. Fig. 3 is a view in side elevation showin the raised out of'the same. Fig. 4 is a view in transverse section on the line 4 4, Fig. 1, looking in the direction of t e arrows.

Fig. 5 'iuaaltop plan view of the core box showing t e.same opened. Fi 6 is a bro- -ken detail view in central section of a core lar view. iii-elevation, otthe same.

shows in: vertical central longitudinal section, parts broken off, a somewhat difierent '56 construction of machine embraced within reason'oi extreme simplicity of struc-- box section? operating cylinder, showing the plgte employed to limit the extent of closing in, var ant of the core box. Fig. 7 is a simi- Fig. 8

the scope of my invention, and which, by

support or bed ture and capability of adjustment, I prefer in many cases.

The same part is designated by the same reference sign wherever it occurs through out the several views.

The operation, of makin cores for use in casting pipes, as ordinari y carried out in raet'ice, is slow and tedious and generally involves the expense and annoyance of manual labor.

It is among the special purposes of In invention to provide a machine which is simple in construction and efiicient in o oration wherein cores may be made rapid y and economically, and by machine operation instead of manual labor, and wherein absolute uniformity is secured throughout the core thereby avoidin damage or injury to the casting resulting groin any deficiency in this respect in the core..

In carrying out In broad statement of Its general scope and purport, I em loy a core box in which the core is forme such core box being con-' traotlble whereby, in forming the core, and to insure absolute uniformity in the density thereof throughout the same I pro jose to ap-.

required to form the core, the various operations being carried out mechanically and substantially continuously, thereby enabling machine made cores to be turned out rapidly and economically. I

\Vhile I have shown and will now describe various constructions and arrangements of apparatus embod ing the princiles of my invention, and the est forms in which I at present contemplate carrying my invention into practical and commereialoporation, the particular constructions and arrangements shown are merely illustrative of the principles involved and may be varied and changed throughout a wide r ngewithout departure from i the broad plrit and scope of my invention as defined in the claims.

In the form shown in Figs. 1 to ,7, I mount stationary illars A, upon a suitable pate B. These pillarsuA, are preferably .0 channel form in cross seotion, as seen in iFig. 4, with e: a r

iiivfention, and in a able spon ing to the channel form of the fixed pillars, and having channels thereof pre such powr sented outwardly and having the side flanges thereof engaging with the full length of the side flanges of its cotiperating channel pillar. I provide means for moving the movable pillars toward and from the common center with reference to which the stationar pillars are fixed. Many specifically di erent constructions and arrangements of moving means may be employed for accomplishing this result. It is Important that the movement of all the movable illars, in or out be etlected simultaneously. In the particular form shown, to which, however, In invention is not to be limited or restricte I em loy cylinders F, mounted upon the fixed il ars, each having a piston A, operatin t erein the rod or stem B, of which exten s at one end through the fixed illar A, and is secured to the movable pilar E. At its other end the rod B, extends through the cylinder head and" carries a head or nut C, thereon, for a purpose presently to be more fully explained. The number of power cylinders to be mounted upon each fixed pillar A, for operatingits cooperating movable pillar E, may be varied according to the ex] encies or requirements, and, therefore, whi e Ihave shown three cylinders on each fixed pillar,

the rod of the"p'iston of each 0 linder bein' connected, as described to t e associate movable pillar, my invention as defined in the claims is not to be limited or restricted in this respect. Power medium such as water, steam, compressed air or the like is admitted simultaneously to one side or the other of all the power cylinders in order to elfect the simultaneous movement in or out, of the movable illars. To accomplish this result I have in( icated a system of pi e conneetions D, adapted, to be control ed by hanilalves E, in any suitable or convenient manner or arrangement. It is obvious that other formsor constructions of power mechanism'may be employed for moving the pillars E, without eparture from the spirit and scope of my invention as defined in the claims.

Carried by each movable pillar E is a core box section G, each suitably shaped upon its inner surface to form a closed cylindrical chamber when said sections are moved to the limit of their closin movement. The number of these core box sections, as in the case of the correspondin fixed and movable pillars may vary accor ing to the exigencies and requirements, and the size of the core to be made, and therefore, while I- haveshown four sections G, my invention as defined in the claimsis not to be limited or restricted in this respect. In practice I prefer to employ hollow core box sections that is, the sections are formed with chambers as-indicated at H, thereby enabling said sections to be heated by supplying a. heati medium, as steam, hot air or the like, to t e chambers II, which thus constitute and form a heating jacket for the core' box sections. It is through the contraction of the core box by theinward movement of the sections G,that the exterior compression is applied to the core, as will more'fully appear hereinafter. The edges A, of the core box section are formed with knife edges whereby any. projecting portions of core material may be cut oil when the final compressing movement of the sections is efiected.

Many specifically different constructions and arrangements may be employed for regulating and measuring the supply of core material to form a core, and for shaping the same and a plying thereto the interior pressure. ile t erefore, I have shown and will now describe one construction and arrangement which I have found simple and efficient 'for the urpose, my invention as defined in the c aims is not to be limited or restricted thereto. In the particular form shown I provide a. core bar T, and arran to move the same longitudinally through t o core box in the operation of forming the core. This core bar may be 'su ported and operated in many s cifically di erent ways. In the particu ar form shown, to which my invention in its broad 110 $60 as defined in the claims is not to be limited, or restricted, said bar is in the form of a hollow sleeve, adapted to be telescoped over the reduced end L, of a lunger M, the latter bein arranged in a cy linder D, sup- 115 orted wit in a well or casm C, the core ar resting upon a shoulder formed by the reduced end L, of such plunger. 'The plunger carrying the core bar is designed to move in a true line with the geometrical 9 center of the core box, the cylinder D, formin a ide for the plunger insures this resu t. he advancin end of the core bar is formed or provide with a tapering rammer head N, the object and functlon of 125 which is to exert an outward pressure upon the material forming the core from the interior thereof, when said rammer head is' advanced through the core box, and to compress such material outwardly. The plunger shown in Fig. 2. The set screws ing tool is to regulate t 80 bar, if not and core bar are arranged to move longitudinally through a loose ring 0, arranged within an auxiliary casing P, surrounding the line of movement of said lunger and 5 bar. The purpose and function of this ring is to compress and shape that iortion of the core material forming the socl zet end of the core and to regulate the amount of such material, said ring being engaged by 1 the shoulder R, on the plunger when the latter is approaching the limit of its advancing movement, and thereafter is advanced along with the plunger from the position shown in Fig. 1, to the osition serve to adjust the osition of the ring 0 within its casing P, t ereb regulatin the amount of material require to form t e socket end of the core.

A displacing or measuring tool S, is arranged to be received and centered upon the advancin end of the core bar, forming the rammer ead N, thereof. The purpose and function of this dis lacing or measurlie amount of core material necessary to be supplied to the core box to form a core, and to preliminarily support the column of such material when so supplied; In the form shown thismeasuror displacing tool, comprises a hollow tu ular bod and when inserted into the core box to e received and centered on the u per end of the rammer head, it coiiperates,

with the inner wall of the core box to pro- 5 vide a space to receive the core material.

The size of the tubular body of the tool determines the size of this space and hence, also, the amount of core material to be supplied, while at the same time, the column of core material is supported b the measuring or dis lacing tool as the p unger advances into it e core box to effect the compression of the core material. The advancing movement of the plunger causes the tool S to be pushed ahead of it, and consequently the tool continues to form a support for the column of core material or that portion thereof in advanceof the rammer head,

until the tool is pushed entirely out of the 0 core box. I

The plunger M, may be operated by admitting a suitable power medium to the cylinder D.

The operation of the machine so far described is as follows :--When it is desired to form a core the plunger is moved into its initial or retracted position and the core bar is telescoped or sleeved thereover, and the rammin head placed on the end of the El ed thereon, and the displacing or measu ing tool S is then placed and centered upon the ramming head. The core box sectionsare now moved toward each other to fo m a partially c osed box, the

space bound d by the interior surface of the core box sections, the exterior surface of the ramming head, the socket ring and the auxiliary casing constituting a chamber of the desired size and diameter, depending upon the relative arrangement and size of these parts, to hold the material necessary to produce a core of the desired size. This space or chamber is then filled with core formin material, and while my invention as define in the claims is not to be limited thereto, I prefer to employ molding sand for this purpose, the measuring tool supporting the column of sand 'within the core box. The plunger carrying the core bar is now ad vanced through the core box, the advancing rammer end or head effecting an interior ramming or compression of the sand and the measuring tool being pushed'out of the core box as the core bar advances. In order to afford a resistance against which the advancing tapered rammer head works, the plate K is cottered or otherwise secured over the end of the closed core box. This plate also serves to centerand guide the measuring tool and core box. As the plunger approaches the limit of its advancing movement, the shoulder R, thereon engages the socket ring 0, and advances the same to effeet a compression and shaping of the sand forming the socket end of the core. When the core bar has been fully advanced into and completely fills the corefhox, it is desirable to give a final exteriorly applied compression to the core. This result ma be accomplished in many specifically ifierent ways. While, therefore, I have shown and will now describe various constructions and arrangements for accomplishing the desired object, it is to be understood that my invention as defined in the claims is not to be limited or restricted thereto. In one form shown I provide a strip J, having openin therethrongh throu h which the outer en s of the iston rod extend, the nuts or heads being outside of said plate or strip J as clearly shown. The openings J, 1n this strip or plate J, are at one part, large enough to permit the nuts or heads 0, to pass through, but at another part said openings are not large enou h to lpermit; the nuts or heads to pass throng and ience by suitably shifting the strips or plates J, in one direction the thickness of such strips or plates will be interposed between the cylinder heads and the nuts or heads C, on the piston rods, thereby preventing a full and complete movement of the core box sections to closed position. When, however the strips or lates J, are shifted or move in the other d rection to bring the full openings J, into register with the nuts or beads C, then the impediment is removed and the power cylinder pistons are permitted to complete their full stroke. In the operation f the machine it is desirable to shift all the lates or strips J, simultaneousl This may inner surfaces of the pillows which are in be effected 1n many specifica ly difierent contact with each other, are inclined relaways. I have shown a simple arrangement, towhich, however, m invention as defined in the claims is not to limited or restricted, wherein each strip or plate is connected to the stem of a iston operating in a small power cylinder mounted upon a suitable supporting bracket N. Power medium is supplied simultaneously to all the power cylinders M, in any suitable or convenient manner thereby simultaneously shifting all the plates or stri 5. After the strips or plates J, are shift to remove them as stops for the power cylinder pistons B, the core box sections are given their final closing movement thereby impjarting the final exterior com ression to t e core and insuring absolute ensit of the core material throughout the forme core and positive adhesion of the core material to the core bar. The core is now finished, the core box is opened, the measuring tool and ramming head are removed and the plunger withdrawn to its initial position. The finished and formed cores may be removed in any suitable or desired manner. In the particular arrangement shown, a hoisting connection L, is suitably secured to the end of the core bar whereby the core bar carrying the core, may be lifted out of the opened box. Of course it is evident that the core bar and core might be removed sidewise through the opening between adjacent core box sections if such opening is sufficiently large. In case the core bar and core are lifted longitudinally out of the core box, it is desirable to protect the finished core from injury by striking or rubbing it ainst the edges of the core box sections. his result may be accomplished in many different ways. In the particular form shown, to which, however, my invention as defined in the claims is not to be limited or restricted, I slip a block K, see Fig. 3, over the end of the core bar, and secure such block thereon by means of a cotter pin S, or otherwise, thereby forming a support for the end of the core. This block K, is of larger diameter than that of the core and hence revents the core from striking against the e gcs of the core box section while the core is being removed.

In Fig. 8 I have shown another construction of machine embodying the broad principles of my invention as defined in the claims, and wherein the casing C, the cylinder D, plunger M, core bar T, rammer head N, and measuring tool S, all remain substantially the same in construction, function and mode of operation as the corresponding parts above described. In this form of my invention the core box sections A", are movable longitudinally'upon stationary pillows B, mounted upon the casing C. The outer surfaces of the core box sections and the tive to the geometrical axis of the core to be formed, while the inner surfaces of the core box sections which form the box to receive and form the core material are truly cylindrical throughout and concentric wit the geometric axis of the core. By reason of this construction and arrangement it will be seen that the desired final and external pressure is applied to the core by merel shifting the core box sections A, longitudinally. In this manner I avoid the necessity for employing independent power cylinders to contract the core box. The longitudinal movement of the core box sections to efiect the exterior application of pressure maybe effected in any suitable or convenient roanner. An exceedin ly simple arrangement is shown wherein said core box sections are arranged to move longitudinally within an auxiliary casin R, said flanged ring 1?, being telescope over a sleeve 0, and resting upon an exterior flange of said sleeve formed at the lower end thereof. The ring P, sleeve 0 and auxiliar casing R, are arranged concentric with t e line of movement of the core bar T, said bar moving therethrough when advanced to or retract/e from its work. As the plunger M, advances to its work, and as it approaches the limit of its advancin thereon whic forms a support for the core bar '1, engages the lower end of sleeve 0, and thereafter said sleeve is raised by the further advancing movement of the plunger. As the sleeve 0, is raised the flange thereon engages the lower end of the ring P, and raises said ring thereby also raising or moving longitudinally the core box section A, and hence causing the same to laterally approach each other or to contract the area of the core box by reason of the inclined surfaces of the pillows B against which said sections slide, thereby giving a final exteriorly applied pressure to the core and completing the same. The sleeve 0 may also serve to shape and compress the material at the end of the core, and by suitably regulating the length of movement of this sleeve the degree of exteriorly applied pressure ma be regulated. From this description it will be movement, the shoulder R,

seen that in this form of my invention I,

have produced an exceedingly simple and efficient machine, and avoid the more or less complicated mechanism employed in connection with the operation of the core box sections of the construction shown in Figs. 1 to 7. After the core has been completed the core box is again expanded to permit the removal of the core-by simply withdrawing or returning the plunger and core bar to their initial retracted positions thereby withdrawin the supports for the core box sections an enabling them to drop by grav- 'ity or to be moved back to their initial positions thereby opening or expanding the core box. a

It will be observed that the core box sections A are hollow, as indicated at H, thereby forming a jacket and enabling such sections to be heated by supplying a heating medium to the interior of such sections.

The operation of the machine will be fully understood from the fore oing description taken in connection with t e accompanying drawings.

Many variations and changes in the details of construction and arrangement might readily suggest themselves to persons skilled in the art and still fall within the s irit and scope of my invention as define in the claims. I do not desire therefore, to be limited or restricted to the exact details shown and described. But

Having now set forth the object and nature of m invention and a construction embodying t e principles thereof, what I claim as new and useful and of my own invention and desire to secure by Letters Patent is In a machine for making molding cores, a core box adapted to receive the core material, means arranged within the box for applying an interior pressure outwardly 0 to the core material, and means for contracting the core box to apply an exterior pressure inwardly to the core material.

2. In a machine for making molding cores, a sectional core box adapted to receive the core material, means arranged within the box for applying an interior means for movin the sections of the core box inwardly to 'ontract such box, and to apply an exterior pressure inwardly to the core material.

In a machine for making molding cores, a sectional core box, means operating within the box to compress the core material outwardly, and power mechanism for simultaneouslymoving the sections of such x to contract the same.

4. In a machine for making molding cores, a core box adapted to receive the core material, means for compressing said material outwardly from the interior of the 7 pressure outward]; to the core material, and

core, and means for applying an exterior" pressure inwardly to such material.

5. In a machine for making molding cores, a core box adapted to receive the core material, and means operating inside the F for forming the core within such'box,

combination with means for heating such x. 6. In a machine for making molding cores, 0. core box having a jacket, adapted to receive a heating medium, and means operating inside the box for forming a core within said box. a

In a machine for making molding anism connected to the movab e pillars to cores, fixed channel pillars, juxtaposed movcores, a core box composed of hollow sections and means for moving said hollow sections toward and from a common center to expand or contract such box.

8. n a machine for making moldin cores, a sectional core box, pistons connect to the sections of saidbox and cylinders in which said pistons work in combination with means operating within the box m1. compress the core material outwardly, and 75 means for simultaneously su pl ing operating medium to all of sand cyfin ers.

9.'In a machine for making molding cores, a contractible core box, means for maintaining said box in condition to receive the core material, means operating within said box to apply an internai compression to the core material, and means for mntracting the box after the core material has been introduced thereto to apply an exterior compression to suchmateria I 10. In a machine for making molding cores, a core box, means for an porting a column of.core material in sai box, and means for a plying pressure to such material in said box, and means for apple ing pressure to such'material both interior y and exterior-1y.

11. In a machine for making molding, cores, fixed pillars and movable core box section cofiperating therewith, and mecha nism 'to move the core box sections, and core box sections carried by the movable pillars. r

12. In a machine for making molding cores, fixed pillars having .a channel form, coiiperating channel pillars mounted to slide u on the fixed pillars, core bo'x sections carmed by the movable pillars and wer mechinoove the same to open and close the core 13. In a machine for making molding cores, fixed pillars, movable illars having full length bearing upon sai fixed pillars, core bo "sections. carried upon said movable pilla and power mechanism. connected to said. movable pillars to move the same.

14. In a machine for making molding able channel pillars having the sides thereof arranged to enga e and slide upon the sides of the fixed pi are, core box sections carried by the movable illars, and power mechanism connected to t e movable pillars to move the same.

15. In a machine for making molding cores, a sectional core box, means opera ting within the box to apply an interior compression to the core material outwardly. and means for moving the sections of said box toward and from a common fccnter to contract or expand the the edges of said sections being formed with knife edges.

16. In a machine for makinn' moldin 130 for re cores, a sectional core box, means for moving the sections of said box toward and from a common center to contract and expand the box stops fol-"limiting the movement of said sections toward each other, and means for withdrawing said stops to permit a completion of such movements. I

17. In a machine for making molding cores, a sectionai core box, power cylinders having their pistons connected to the core box sections, movable stops for limiting the movements of said pistons, and means for shifting said stops to permit complete move-- ments of said pistons.

18. In a machine for making molding fixed illars, power cylinders carrie thereb and having pistons and rods, core box sections connected, to said rods, stop plates having openings through which said rods extend, and means for shifting said plates to move the openings therein into and out of register with said rods.

19. In a machine for making molding cores, 9. contractible core box adapted to receive the core material, means adapted to be moved through said core box to exert an interior pressure outwardly upon the core material and means for contracting the core box to exert an exterior pressure inwardly upon such material.

20. In a machine for making molding cores, a core box adapted to receive the core material means arranged within said box lating and measuring the amount of material required to form a core, a core bar, means for moving said her through the box to compress the core material outwardly, and means for contracting the box to compress the core material on the bar.

21. In a machine for making molding cores, a core-box adapted to receive the core material, a core bar means for moving the same through the box to exert an outward pressure on the core material, means for contracting the box to exert an inward pressure on said material, and means for opening the box to permit the removal of the bar and core.

22. In a machine for making molding cores, a core box adapted to receive the core material, a core bar, means for moving said bar into the box, means for thereafter contractin the box to compress the material on the er, and means to permit the box to ex and for the removal 0 the finished core an bar.

23. In a machine for making molding cores, a core box adapted to receive the core material, a core'bar, means for movin the same through the box, a rammer hea carried by the bar, and means for contra cting the box. j l

24. In a machine for making molding cores, a core box, a core bar, a measurin tool, means for moving the bar and too through the box, and means for contracting the box.

25. In a machine for making molding cores, a core box, a core bar, and a measuring tool, means for centering the tool upon the end of the bar, and-means for contracting the box.

26. In a machine for making molding cores, a core box, a core bar, a plunger upon which said bar is mounted and by which said bar is moved endwise throu h the box, and means for contracting said box.

27. In a machine for making molding cores, a core box, a plunger, a core bar sleeved over said plunger, whereby when said plunger is moved said bar is moved through the box, and means for contracting said box.

28. In a machine for making molding cores, a core box, a core bar and means for moving the same through the box, in combination with a plate secured over the end of the core box to resist the ressure of the advancing movement of the er and means for contracting the box.

29. In a machine for making molding cores, a core box, a core bar, means for moving the same through the box, means for contracting and expanding the box, and

means for preventing the core from striking the box while bein removed therefrom.

30. In a machine or making molding cores. a core box, a core bar, means for moving the same through the box, and means for contracting andex ending the box, in combination with a bloc mounted upon the core, said block being of greater diameter than the exterior diameter of the core.

31. In a machine for making molding cores, a core box, a core bar, means for moving the same through the box, a socket rin through which the core bar is moved, sai ring ada ted to shape thesocket end of the core, an means for contracting said box.

32. In a machine for making moldin cores, a core box a casing, a socket ring a justably mounted therein, a plun er, means for o crating the same, said p unger arrange to enga e said ring and advance the same to its wor and means for contracting said box.

33. In a machine for making molding cores :1 core box, a socket ring, a plunger, a core bar carried thereby, and means for contractin the box.

34. n a machine for making molding cores, a core bar, a socket ring, a plunger a core bar carried thereby, a measuring too carried by the core bar, and means for contractin the box. i

35. cores, a core box, a core bar, means for moving the same through the box, a tapering rammer head mounted on the end of the bar, and means for contracting the box.

n a machine for making molding 36. In a machine for making molding the same to its work and means for contracting the box.

cores, :1 core box, a shouldered plunger, :1

core bar, sleeved over said plunger and rest- In testimony whereof I have hereunto set' ing on the shoulder thereon, a socket ring 1 my hand in the presence of the suhsrrilving 15 5 through which the core bar and plunger opwitnesses, on this 21st day of October A. D.

erate, and means for contracting said box. 1908.

37. In a machine for making molding FRFD H FRBFRT cores, a core box, a casing, a socket ring adl 1 WVitnesses justably mounted thereln, 21 plunger and 10 means for operating the same, said plunger arranged to engage sald ring and advance H. NIXON, F. HERBERT, Jr. 

